Terms containing relationship for the long term

Subject	English	Russian
Makarov.	relationship between the inflow and discharge of ice in a body of water for a year or on average for a long-term period	соотношение прихода и расхода льда в водоёме за год или в среднем за многолетний период
gen.	relationship for the long term	отношения на долгую перспективу (theverge.com Alex_Odeychuk)